Air-compressor.



W. R. THOMPSON.

AIR COMPRESSOR.

APPLICATION FILED 00T.19, 1911.

Patented May 14, 1912.

INVENTOR WI 7W E 88E 8 jmw J ar ATTORNEY UNITED. srAr-Es PATENT orriion.

'WILLIAM B. THOMPSON, or scorn NORWALK, connncrrcu'r, ASSIGNOZR. or ONE-HALF 'ro JOHN rmnour, or BROOKLYN, new YORK, nnette-FO RTH r ELMER n.

, following is a specification.

CASE, or soc'rn NonwALK, oonnncrrcu'r.

AIR-COMPRESSOR.

fipecification of Letters latent. PafientedMay 14, 1912. Application fl1ed-0ctoher19; 1911. Serial No. 655,371. i

To all whom it may concern: L a Be it known that LWVmLmM'R. Tnorrr: son, a citizen of the United 'States,iresid- State of Connecticut, have invented an Improvement in Air-Compressors; of which the This invention'relates to thetype of air compressors. illustrated and described in- Letters Patent Number 940,751,- granted to me November 23, 1909, and has forits ob ject to provide a compressor of this type adapted for general use and especially adapted for use cle tires.v

. With this andother objects in'view I-have devised an air compressor in which the. spring is placed outside the cylinder so that: i there is no loss of air space whateverwithinj the cylinder and the entire area of the piston head may be used for compression, thus enabling me to utilize the full power.-applied to the piston and to developa v'ery" v much. higher pressure than has been p0 compressor of this type here j-f sible with any tofore produced. v v i I To these ends the invention consists 11112116 simple and novel construction which} will now describe and then specifically point out in the claims hereunto appended.

In the accompanying drawing'iforming part of this specificatio'n,- Figure-1. is an n with and 12 heat radiating ribs which may elevation ofmy novel compressor partly-in longitudinal section, the piston being re-' tracted; and Fig.2 is a,1ongitudinalsec-- tion on a plane at right angles to the plane of Fig. 1, the piston being at its forward" .position, that is approximately in with the cylinder head. 1 v 10 denotes a frame which may be of any ordinary or preferred construction, 11 a cylinder which may be cast integral therebe provided on the cylinder. The cylinder head 13 is secured to the cylinder by bolts 14 and is provided with an inlet nipple 15,,

the inner end of which forms a seat for a valve 16 which is normally held seated by aspring 17. 4

18 is an outlet pipe connected to the cylin -l der head and 19 a check valve which is normally held in engagement with a seat in the cylinder head by a spring 2Q.

Within the cylinder ,is a lining shell 21 in inflating pneumaticvehi contact within which the piston 22- reciprocates. This lining shell is secured in the inner end of the cylinder ,bya drive fit. Outside ztlie ing at South Norwalk, county of Falrfield,

outer end of the shell is a circularrecess 23 length, more or less, of thebore of the cylinder and receivesthe spring at.

'For 'the' sake of lightness and cheapness therein-far enough to' 'form a pocket 30in Itwill be obviousjhoweventhat the piston may be otherwise constructed, if preferred, providedit has the enlarged base. Y

,actuating cam which is carried by the shaft. .;This cam'ispreferably made in two parts which are. tongue-and-grooved together and ,se'curedby" .pins 34: as clearly shown in Fig. 2.] T his 'is in order to permit the cam from ashaft fwithout disturbing the shaft. :v '35 denotes a locking'lever which is pivoted to'a lug 363cast npon the frame and is in itsforward position,- asin Fig. 2, to

retain it in theforward sition.;i

claim:

1. Anau' compressor 1 comprising a ---"c'a s{ at one endto' form an annular recess, 'a' rigid lining shell secured-within said bore and inghaving a longitudinal bore and enlarged at one end to orm an annular recess, a

a second lining shell secured 'withinsaid in the circular recess and-extends upward which the lower end of the spring isseated. I

. til-denotes the shaft which is journaled bearings 32 upon the frame and 33 an and. frame to beatt'ached to and removed.

1 adapted to be swungnnder the piston when ing havinga' longitudinal bore and enlarged 2. An air compressor comprising a cas q rigid lining shell secured within said bore.

in the cylinder" which extends half theo Having thusdescribed my invention 'l cooperating with-thewallof said recess to form an annularzchamberga piston mountedrecess, a piston mounted to reciprocate in the first mentioned shell and having .an enlargement working in the second shell, a spring located between said shells and'acting against the enlargement in said piston, and means for moving the piston in opposition to the spring.

3. An air compressor comprising a casing having a bore provided with an annu-- 4. An air compressor comprising a casing having a bore provided with an annular enlargement, a tube mounted to reciprocate within said bore, a plug closing the upper end of said tube, whereby a piston is ormed, an enlarged base larger in vdiameter than said tube and having a reducedplug for an enlarged base closing t closing the outer end of the latter, said base being arranged to reciprocate within the annular enlargement of said bore, a spring acting against said base, and means for moving the piston in opposition to said spring.

v 5. An air compressor comprising a casing having a longltudlnal bore and an enlarged recess, a lining shell secured in said bore, and cooperating with said recess to form a chamber, a tube mounted to reciprocate in said sleeve, a plug closing the upper end of said tube, whereby a piston is formed,

- e lower end of said tube and arranged to reci rocate within the annular enlargement c said bore, a

spring within said chamber and acting upon said base, and means for moving the piston in opposition to said spring.

In testimony whereof I aflix my signature in presence of two witnesses.

- WILLIAM RITHOMPSON.

Witnesses:

SPENCER S. ADAMS, T. H. LEONARD Ronms. 

